— I think Mr. Zhang may be in his office.— No he be there. I saw him there just now.A.

问题补充：

— I think Mr. Zhang may be in his office.

— No, he be there. I saw him there just now.

A. can’t; went

B. mustn’t; left

C. can’t ; leave

D. may not; going

答案：

A. can’t; went

B. mustn’t; left

(答案→)C. can’t ; leave

D. may not; going

解析： 句意:我认为张先生可能在他的办公室。不，他不可能在那。我刚刚看见他离开了。can’t不可能；mustn’t不可以；may not;可能不。See sb do sth 看见某人做了某事，所以选C。